<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      const r1 = 100 - "abc";
      console.log(r1); // 100 - Number("abc") -> NaN

      const r2 = "100" / "20";
      console.log(r2); // 100 / Number("20") -> 20
    </script>
  </body>
</html>
